diff --git a/src/core/delete.c b/src/core/delete.c
index 0ae1676da..43bd503c7 100644
--- a/src/core/delete.c
+++ b/src/core/delete.c
@@ -103,8 +103,8 @@ delete_ping_timeout_func (MetaDisplay *display,
 
   dialog_pid =
     meta_show_dialog ("--question",
-                      window_content, 0,
-                      window->screen->number,
+                      window_content, NULL,
+                      window->screen->screen_name,
                       _("_Wait"), _("_Force Quit"), window->xwindow,
                       NULL, NULL);
 
diff --git a/src/core/keybindings.c b/src/core/keybindings.c
index 69ca42942..79f1e42db 100644
--- a/src/core/keybindings.c
+++ b/src/core/keybindings.c
@@ -2444,7 +2444,7 @@ static void
 error_on_command (int         command_index,
                   const char *command,
                   const char *message,
-                  int         screen_number,
+                  MetaScreen *screen,
                   guint32     timestamp)
 {
   if (command_index < 0)
@@ -2473,7 +2473,7 @@ error_on_command (int         command_index,
       meta_show_dialog ("--error",
                         text,
                         NULL,
-                        screen_number,
+                        screen->screen_name,
                         NULL, NULL, 0,
                         NULL, NULL);
 
@@ -2485,7 +2485,7 @@ error_on_command (int         command_index,
       meta_show_dialog ("--error",
                         message,
                         NULL,
-                        screen_number,
+                        screen->screen_name,
                         NULL, NULL, 0,
                         NULL, NULL);
     }
@@ -2557,7 +2557,7 @@ handle_run_command (MetaDisplay    *display,
       
       s = g_strdup_printf (_("No command %d has been defined.\n"),
                            which + 1);
-      error_on_command (which, NULL, s, screen->number, event->xkey.time);
+      error_on_command (which, NULL, s, screen, event->xkey.time);
       g_free (s);
       
       return;
@@ -2566,7 +2566,7 @@ handle_run_command (MetaDisplay    *display,
   err = NULL;
   if (!meta_spawn_command_line_async_on_screen (command, screen, &err))
     {
-      error_on_command (which, command, err->message, screen->number, event->xkey.time);
+      error_on_command (which, command, err->message, screen, event->xkey.time);
       
       g_error_free (err);
     }
@@ -3568,7 +3568,7 @@ handle_run_terminal (MetaDisplay    *display,
 		  "keybinding press\n");
       
       s = g_strdup_printf (_("No terminal command has been defined.\n"));
-      error_on_command (-1, NULL, s, screen->number, event->xkey.time);
+      error_on_command (-1, NULL, s, screen, event->xkey.time);
       g_free (s);
       
       return;
@@ -3577,7 +3577,7 @@ handle_run_terminal (MetaDisplay    *display,
   err = NULL;
   if (!meta_spawn_command_line_async_on_screen (command, screen, &err))
     {
-      error_on_command (-1, command, err->message, screen->number,
+      error_on_command (-1, command, err->message, screen,
                         event->xkey.time);
       
       g_error_free (err);
diff --git a/src/core/session.c b/src/core/session.c
index c11bce9d6..65542f39d 100644
--- a/src/core/session.c
+++ b/src/core/session.c
@@ -1804,7 +1804,7 @@ warn_about_lame_clients_and_finish_interact (gboolean shutdown)
                            "and will have to be restarted manually next time "
                            "you log in."),
                          "240",
-                         meta_screen_get_screen_number (meta_get_display()->active_screen),
+                         meta_get_display()->active_screen->screen_name,
                          NULL, NULL,
                          None,
                          columns,
diff --git a/src/core/util.c b/src/core/util.c
index 2ea5eb5a9..3144b9bd6 100644
--- a/src/core/util.c
+++ b/src/core/util.c
@@ -588,7 +588,7 @@ GPid
 meta_show_dialog (const char *type,
                   const char *message,
                   const char *timeout,
-                  const gint screen_number,
+                  const char *display,
                   const char *ok_text,
                   const char *cancel_text,
                   const int transient_for,
@@ -596,7 +596,6 @@ meta_show_dialog (const char *type,
                   GSList *entries)
 {
   GError *error = NULL;
-  char *screen_number_text = g_strdup_printf("%d", screen_number);
   GSList *tmp;
   int i=0;
   GPid child_pid;
@@ -607,8 +606,8 @@ meta_show_dialog (const char *type,
 
   argvl[i++] = "zenity";
   argvl[i++] = type;
-  argvl[i++] = "--screen";
-  argvl[i++] = screen_number_text;
+  argvl[i++] = "--display";
+  argvl[i++] = display;
   argvl[i++] = "--class";
   argvl[i++] = "mutter-dialog";
   argvl[i++] = "--title";
@@ -673,7 +672,6 @@ meta_show_dialog (const char *type,
     unsetenv ("WINDOWID");
 
   g_free (argvl);
-  g_free (screen_number_text);
 
   if (error)
     {
diff --git a/src/meta/util.h b/src/meta/util.h
index 815ced517..096cdb3a9 100644
--- a/src/meta/util.h
+++ b/src/meta/util.h
@@ -105,9 +105,9 @@ char* meta_g_utf8_strndup (const gchar *src, gsize n);
 void  meta_free_gslist_and_elements (GSList *list_to_deep_free);
 
 GPid meta_show_dialog (const char *type,
-                       const char *title,
                        const char *message,
-                       gint timeout,
+                       const char *timeout,
+                       const char *display,
                        const char *ok_text,
                        const char *cancel_text,
                        const int transient_for,